Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889882 | Tetramethyl piperidyl terminated triazine oligomeric esters and amides | Richard V. Nelson | 1989-12-26 |
| 4883831 | Melamine-based light stabilizers for plastics | Richard V. Nelson | 1989-11-28 |
| 4883860 | Triazine-based light stabilizers for plastics | Richard V. Nelson | 1989-11-28 |
| 4866185 | Difunctional polyfluoroaromatic derivatives and a process of preparing the same | Ludwig Hartmann | 1989-09-12 |
| 4851461 | Tetraalkyl piperidylated stabilizers for plastics | Richard V. Nelson | 1989-07-25 |
| 4826983 | N-2,2-dimethyl-2-(2-hydroxy-alkylphenyl) heterocycles and stabilized compositions | James P. Neilan | 1989-05-02 |
| 4804699 | Monomeric and oligomeric glutarate-based light stabilizers for plastics | Richard V. Nelson | 1989-02-14 |
| 4801757 | Noncrystalline tris(4-hydroxy-2-methyl-5-tert. butylphenyl) butane | Jerry H. Smith | 1989-01-31 |